That's not in code. There are a few ways of things becoming law. The first is that it is in code as a statute. This is from the legislature. The other is from the courts. That's the law in precedent. If you're going with Roe v. Wade then it's in precedent and not code.

Roe v Wade privacy is in regards to the law interfering with life, liberty, or property. The life in question is the individual's. In other words, medical decision. Privacy of communication is subject to wiretap laws which can be superseded by a court order. Roe v Wade offers nothing for the sort of privacy you're arguing about.

"The militia of the Commonwealth of Virginia shall consist of all able-bodied residents of the Commonwealth who are citizens of the United States and all other able-bodied persons resident in the Commonwealth who have declared their intention to become citizens of the United States"

There's your first problem. There isn't a registry of guns. Some states have them. Others don't.

For example, Virginia doesn't have a registry of guns. When the police find a gun they reference it to the manufacturer and that traces back to the FFL dealer that sold the gun. The dealer then provides law enforcement with the identity of the person who purchased it. Now, after that it gets all fuzzy. In Virginia's case, private sales do not have any paper work. I could say "Yeah I sold that gun. Don't remember who I sold it to. Sorry." That'd be the end of that.

Getting states to approve a registry of guns is a bit of a challenge. Best of luck getting that done in the majority of states.

> It's an aid to crime solving, in the same way serial numbers on the gun itself are an aid.

The serial numbers on a gun doesn't aid in solving a crime at all. It's there mostly as an identification and tracking system. There aren't any effective matching systems between shell casing/bullet "fingerprint" and serial numbers. Maryland tried it. It failed.

Would Jeffrey Toobin consider McDonald vs. City of Chicago to be a major case? How about Washington DC vs. Heller? Prosecution over defendant in every major case? Jeffrey Toobin isn't paying attention or he's very selective about what's "major".